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Displaying 20851 - 20875 of 74347

Non-imaging Winston Cone Concentrators for Submillimeter-wave, Overmoded Waveguide

January 1, 2014
Author(s)
Erich N. Grossman, Oscar D. Friedman, Andrew O. Nelson
We describe the design, simulation, and measured performance of concentrators designed to couple submillimeter wavelength radiation from free space into highly overmoded, rectangular, WR-10 waveguide. They consist of a combination of a Winston cone, (also

R Implementation of a Polyhedral Approximation to a 3D Set of Points Using the Alpha-Shape

January 1, 2014
Author(s)
Thomas V. Lafarge, Beatriz Pateiro Lopez, Antonio M. Possolo, Joy P. Dunkers
This work describes the implementation in R of the alpha-shape of a finite set of points in three-dimensional space. This geometric construct generalizes the convex hull and estimates the shape of non-convex and even non-connected sets in 3D, given random

Reducing the Risk of Fire in Buildings and Communities

January 1, 2014
Author(s)
Anthony Hamins, Jason D. Averill, Nelson P. Bryner, David Butry, Richard Gann, Rick D. Davis, Daniel M. Madrzykowski, Alexander Maranghides, Jiann C. Yang, Matthew Bundy, Samuel Manzello, Jeffrey W. Gilman, Francine K. Amon, William E. Mell
Fire costs and losses are a significant life safety and economic burden on society comprising about two percent of the United States gross domestic product. This paper presents the results of a roadmap developed by the National Institute of Standards and

The Mott Transition in a Bose Gas Measured Through Time of Flight

January 1, 2014
Author(s)
Ian B. Spielman, Karina Jimenez-Garcia
Ultracold atoms in optical lattices can realize nearly perfect analogs to condensed matter model systems without the complexity present in materials. In this chapter, we thoroughly describe our experimental characterization of the transition from

Using and creating databases for data analysis in laser spectroscopy

January 1, 2014
Author(s)
Alexander Kramida
A brief review of existing atomic spectroscopy databases is given with an emphasis on databases relevant to laser spectroscopy research. Key data elements in these databases are described. A strategy of building a specialized relational database for laser

A New Standard for Securing Media-Independent Handover: IEEE 802.21a

December 31, 2013
Author(s)
Rafa Marin-Lopez, Fernando Bernal-Hidalgo, Subir Das, Lidong Chen, Yoshihiro Ohba
When enabling handover between different radio interfaces (e.g., handover from 3G to Wi-Fi), reducing network access authentication latency and securing handover related signaling messages are major challenging problems, amongst many others. The IEEE 802

Chapter 3 Evaluation of Atmospheric Loss Processes

December 31, 2013
Author(s)
Vladimir L. Orkin, James B. Burkholder, Wahid Mellouki, Eric L. Fleming, Christian George, Charles H. Jackman, Timothy J. Wallington , Michael J. Kurylo , Dwayne E. Heard, William H. Swartz
Hydroxyl radical (OH), electronically excited atomic oxygen (O(1D)), and atomic chlorine (Cl) reaction rate coefficient data were evaluated and the estimated uncertainties in the recommended parameters reduced, in general, from those currently recommended
Displaying 20851 - 20875 of 74347
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